Office chair



FIG. 1 is a front perspective view of an office chair;

FIG. 2 is a front elevation view of the office chair of FIG. 1;

FIG. 3 is a rear elevation view of the office chair of FIG. 1;

FIG. 4 is a left-side view of the office chair of FIG. 1;

FIG. 5 is a right-side view of the office chair of FIG. 1;

FIG. 6 is a top plan view of the office chair of FIG. 1; and,

FIG. 7 is a bottom plan view of the office chair of FIG. 1.

The broken line illustrations show the environment of the invention and are not part of the design sought to be patented. 

CLAIM The ornamental design for an office chair, as shown and described. 